<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="../resources/test-helper.js"></script>
<head>
<title>Dropping image on vertical page scrollbar</title>
<style type="text/css">
p:first-child
  {padding-left:1em;}
div
  {width:1ex;
  margin-left:auto;}
img
  {width:5px;
  height:5px;}
body
  {height:3000px;}
</style>
<script type="application/ecmascript">
function dragImage()
  {event.dataTransfer.effectAllowed = 'copy';}
function dropImage(event)
  {document.querySelector('div').firstChild.nodeValue = 'P A S S';}
</script>
</head>
<body ondragenter="event.preventDefault()" ondragover="return false">
<p><img src="" alt="PNG green pixel" ondragstart="dragImage()"/></p>
<p>Drag little square above and drop it on vertical scrollbar. Word PASS should appear near scrollbar once you drop it.</p>
<div>→ → → → → → → → → → → → → → → → → → → → → → → → → → → → → → → → → → → →</div>
<script>
async function test(){
  await new Promise(loaded => window.addEventListener("load", loaded));
  const img = document.querySelector('img');
  const div = document.querySelector('div');
  function onDropCallBack(event) {
    dropImage(event);
    assert_equals('P A S S', div.firstChild.nodeValue);
    return true;
  }

  dragDropTest(img, div, onDropCallBack, 'Dragging the image to the vertical scrollbar should copy it there');
}
test();
</script>
</body>
</html>
